Heated form for rubber-dipped goods.



C. S. WILLIAMS.

HEATED FORM FOR RUBBER DIPPED GOODS. APPLICATION` FILED MAR. 26.1915. L1 L.. ,@53, Patented Dee. 7, 1915.-

A .TTOHIVE Y CARL WILLIAMS, OF NEW YORK, N. Y., ASSIGNOR TO REVERE RUBBER COMPANY, A

CORPORATION OF RHODE ISLAND.

HEATED FORM FOR RUBBER-DIPPED GOODS.

Application filed March 26, 1915.

To f/IZ re/wm t may concern:

Be it known that I, Cani. S. WILLIAMS, a citizen o't' the United States, residing 1n the cit)v of New York, county of New York, and

State of New York, have invented certain new and useful Improvements in Heated Forms Jfor Rubber-Dipped Goods, of which the followingI is a full, clear, and exact description.

My invention relates to forms for use in the production of vulcanizable plastic articles by the so-called dipping method.

lt is customary in making articles of rubber or other vulcanizable plastics to vsubu merge or dip a form having the configura tion of the desired article into a bath of the plastic brought to a fluid or semi-fluid state by'ineans ot' a volatile solvent. After each submersion or dip of the form, it is exposed to the air for a sufficient interval to allow the solvent to evaporate from the. coat of material on the form. `When the form has been thus dipped and dried a suiiicient number of times to produce a coat o't' the plastic material to the desired thickness thereon, the vul- ;-anizable plastic upon the form is subjected to a vulcanizing treatment."

rl`he present invention proi'ides a Jform which is capable of beingr heated uniformly throughout whereby the time required in evaporating the solvent in thv-plastic accumulated upon the form is irmtcrially reduced.

lVith the above and other objects in View the invention consists in certain novel details of construction and combination of parts hereinafter fully described and claimed it beingr understood that various modifications may be resorted to within the scope of the appended claims without departing trom thc spirit or sacrificing any of the advantages oi the invention.

The invention will be readily understood from the following description taken in connection with the accompanying drawing in which the figure is a longitudinal sectional view through a for'in embodying,r my invention and associated with a heater.

ln the present embodiment of the invention l have illustrated a glove 'orm 10, although it is to be understood that the invention is not limited to thisparticular type of iorm but includes forms of all other types adapted for use in connection with the dipping process of manufacturing vulcanizable Specification of Letters Patent.

Patented Dec. 7, 1915. serial No, 17,144. i

plastic articles. The form 10 is constructed in the nature of a hollow shell, and is pref erably constructed of bronze although other desired materials Amay be used. The form is closed at the wrist portion by a closure 11 which also is preferably formed of bronze and is sealed air tight to the body of the form. An opening 1:2 is formed in the closure and a removable plug 13 seals this opening. A tube 14 open at one end, is threaded at theI open end in an axial opening 15 formed in the closure and projects longitudinally into the form, there being a nut 1G threaded on to the tube outside of the closure, which nut is provided peripherally with a groove 17 the be `presentlv explained.

ln carryingF out the invention, the above purpose of which will described 'form is inverted from the position shown in the drawing and is filled about twoethirds full with a volatile liquid 18, such as for instance gasolene. The form is then heated in any suitable manner until the ,easolene boils treelyfit bcing'understood that the plug 13 is removed prior to such heating operation, so that the gasolene vapor may pass into the atmosphere. After the liquid has boiled tor a sulicient period of time to assure of there being;r only a Vapor oi graso ene together with gasolcne liquid in the t'orm the plug 18 is inserted and the iorm allowed 'to cool. Since the form was 4sealed while thc liquid was boiling, there only the vapors of will exist within the 'form the liquid together with a quantity ofi-.the liquid itself.

ln practice the form in the position shown inthe pgure is inserted upon a pipe 19 which is in communication with a supply pipe 20 from any suitable source of heat, there being spring lingers 21 on the pipe 19 that spring,r into the groove' 17 of the nut 16 andanchor the form in place. Heat transmitted through the pipes 19 and 14 to the liquid raises the vapor pressure of the liquid and va por will come ol' the surface thereof. If

any pa rt of the form is cooler than the heateffecting uniform heating of; the form throughout. s

v Havingthus described my inyention, what I claimand desireto protect byLetters Pat? ent is:

1.An apparatus for ,building rubber dipped goods, 'comprisinw' a 'hollow form illed with va volatile liquids and vapors thereofyand means for transferring heat to the form through' the medium of the liquid and vapors thereof; y

2. AnV apparatus for lforming rubber dipped' goods embodying a hollow form sealed against entry of air to the interior thereof, a heat transferring medium in said interior, andv means for heating the form through'the instrun'lentaiity of said medium. i

3. A form for manufacturing rubber dipped 2goods embodyingr a shell, a tube pro- ACARL s. WILLIAMS. 

